Llama 3.1 405B vs LFM2-24B-A2B

Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.

Llama 3.1 405B is clearly ahead on the aggregate, 59 to 38. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

Llama 3.1 405B's sharpest advantage is in mathematics, where it averages 74.9 against 50.4. The single biggest benchmark swing on the page is SWE-bench Verified, 46 to 18.

Llama 3.1 405B gives you the larger context window at 128K, compared with 32K for LFM2-24B-A2B.

Quick Verdict

Pick Llama 3.1 405B if you want the stronger benchmark profile. LFM2-24B-A2B only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.

Agentic

Llama 3.1 405B

Llama 3.1 405B

53.9

LFM2-24B-A2B

33.4

53
Terminal-Bench 2.0
30
58
BrowseComp
38
52
OSWorld-Verified
34

Coding

Llama 3.1 405B

Llama 3.1 405B

40.6

LFM2-24B-A2B

18

62
HumanEval
42
46
SWE-bench Verified
18
37
LiveCodeBench
17
43
SWE-bench Pro
19

Multimodal & Grounded

Llama 3.1 405B

Llama 3.1 405B

62.3

LFM2-24B-A2B

41.7

60
MMMU-Pro
39
65
OfficeQA Pro
45

Reasoning

Llama 3.1 405B

Llama 3.1 405B

68.3

LFM2-24B-A2B

46.6

68
SimpleQA
44
66
MuSR
42
82
BBH
63
68
LongBench v2
48
65
MRCRv2
45

Knowledge

Llama 3.1 405B

Llama 3.1 405B

53.2

LFM2-24B-A2B

35.6

70
MMLU
46
70
GPQA
45
68
SuperGPQA
43
66
OpenBookQA
41
71
MMLU-Pro
51
7
HLE
4
65
FrontierScience
43

Instruction Following

Llama 3.1 405B

Llama 3.1 405B

86

LFM2-24B-A2B

68

86
IFEval
68

Multilingual

Llama 3.1 405B

Llama 3.1 405B

80.1

LFM2-24B-A2B

61.4

84
MGSM
64
78
MMLU-ProX
60

Mathematics

Llama 3.1 405B

Llama 3.1 405B

74.9

LFM2-24B-A2B

50.4

70
AIME 2023
46
72
AIME 2024
48
71
AIME 2025
47
66
HMMT Feb 2023
42
68
HMMT Feb 2024
44
67
HMMT Feb 2025
43
69
BRUMO 2025
45
82
MATH-500
57

Frequently Asked Questions

Which is better, Llama 3.1 405B or LFM2-24B-A2B?

Llama 3.1 405B is ahead overall, 59 to 38. The biggest single separator in this matchup is SWE-bench Verified, where the scores are 46 and 18.

Which is better for knowledge tasks, Llama 3.1 405B or LFM2-24B-A2B?

Llama 3.1 405B has the edge for knowledge tasks in this comparison, averaging 53.2 versus 35.6. Inside this category, GPQA is the benchmark that creates the most daylight between them.

Which is better for coding, Llama 3.1 405B or LFM2-24B-A2B?

Llama 3.1 405B has the edge for coding in this comparison, averaging 40.6 versus 18. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.

Which is better for math, Llama 3.1 405B or LFM2-24B-A2B?

Llama 3.1 405B has the edge for math in this comparison, averaging 74.9 versus 50.4. Inside this category, MATH-500 is the benchmark that creates the most daylight between them.

Which is better for reasoning, Llama 3.1 405B or LFM2-24B-A2B?

Llama 3.1 405B has the edge for reasoning in this comparison, averaging 68.3 versus 46.6. Inside this category, SimpleQA is the benchmark that creates the most daylight between them.

Which is better for agentic tasks, Llama 3.1 405B or LFM2-24B-A2B?

Llama 3.1 405B has the edge for agentic tasks in this comparison, averaging 53.9 versus 33.4. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.

Which is better for multimodal and grounded tasks, Llama 3.1 405B or LFM2-24B-A2B?

Llama 3.1 405B has the edge for multimodal and grounded tasks in this comparison, averaging 62.3 versus 41.7. Inside this category, MMMU-Pro is the benchmark that creates the most daylight between them.

Which is better for instruction following, Llama 3.1 405B or LFM2-24B-A2B?

Llama 3.1 405B has the edge for instruction following in this comparison, averaging 86 versus 68. Inside this category, IFEval is the benchmark that creates the most daylight between them.

Which is better for multilingual tasks, Llama 3.1 405B or LFM2-24B-A2B?

Llama 3.1 405B has the edge for multilingual tasks in this comparison, averaging 80.1 versus 61.4. Inside this category, MGSM is the benchmark that creates the most daylight between them.

Last updated: March 12, 2026

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